Water enters the canister via the intake strainer and is guided through a large sponge to trap particulate matter.

The water then reaches 500g of activated carbon to remove harmful dissolved organic compounds.

Water is directed over the ceramic rings that offer a tremendous amount of surface are internally and externally to grow beneficial aerobic bacteria that break down harmful ammonia and nitrate and nitrite.

All filtered water then passes through our powerful UV-C lamp for pathogen and green water elimination.

ADVANCED FEATURESReaction 4 Stage Canister Filters are equipped with the most advanced features to provide high performance and make routine maintenance quick and easy.

Integrated Self Priming Lever

Quick Disconnect Shut Off Valve

On/Off Switch for UV-C Germicidal Lamp

High Capacity Media Storage

INTEGRATED SELF PRIMING LEVER Our innovated self priming lever eliminates the need for manual siphoning. Simply, pump the lever up and down vigorously until the water enters the inlet and the remaining air bubbles leave the outlet.

QUICK-DISCONNECT SHUT OFF VALVEDefinitely the most useful feature to keep floors dry when carrying out routine monthly maintenance

The Quick Disconnect Shut Off Valve is an integrated tool that instantly creates a watertight seal that stops water from entering or exiting the filter.

Simply lift the SHUT OFF VALVE handle to the vertical position to stop water flow.

Grab the handle and detach and take the canister filter for convenient media replacement.

ON/OFF SWTICH FOR UV-C GERMICAIDIAL LAMPThis revolutionary concept integrates a special UV-C lamp to destroy green water and polish water to crystal clarity.

The accessible ON/OFF switch allows for complete user control

HIGH CAPACITY MEDIA STORAGEThe new trend in canister filters is to increase the filter storing capacity for larger amounts of chemical and biological medias.

This allows for higher water quality due to more media contact through the initial pass. All filter baskets have convenient handles for removing and loading up all types of media that can be easily customized.

JBJ is a top-of-mind brand name in freshwater and saltwater aquarium supplies. The company is committed to innovation and manufacturing only the absolute highest quality equipment. JBJ’s philosophy is "to create products that provide extra value" to hobbyists. JBJ produces hundreds of aquarium products including lights, filters, heaters, UV sterilizers, wavemakers and top-off systems. The company is best known for their affordable line of Arctica chillers and the best-selling Nano Cube aquarium series. We carry the gamut of JBJ products and accessories and are happy to provide you free technical support while you’re setting up your new equipment.

JBJ Reaction 4-Stage Canister

decent filter

by
JAMIE SLOAN

Great

Posted: 6/25/2013 from BOWLING GREEN, KY UNITED STATE

4.05

Experience Level:
Intermediate

Comments:ive had this filter for over a year now,no problem,but....to those that are complaining about the flow rate,if you are using the white fine pads your flow will be slowed down o about 80 gph,the best thing to do is to go too you lfs and buy media pads and cut your own,hope this helps.

efu-45Uv

by
JAMES

Below Average

Posted: 4/20/2012 from HUNTINGTON BEACH, CA

2.05

Experience Level:
Intermediate

Comments:Good size with lots of room for filtration substrates. Very EZ to setup and service.
I am using this unit on a 55 Gal tank. Unit primes as advertised and runs very quiet. No external leaks. States Flow Rate: 290gph. Seems much less than that. After 4 days the tank was still not clear and the low flow was not sucking up particulates very well.
On the 5th day I was shocked. Literally! the water had a slight electrical charge to it. Unplugged the unit and after some searching I found the UV light unit full of water up to the wires inside the top of the unit and the glass cracked. Took the whole unit apart and dried wires the and put it back together. Everything works but I now need to replace UV glass.
Doubt I will trust this filer on its own now.. I am going to try and waterproof the electrical system from the water system via silicon in case it backs up again. I will use this as a secondary filter but look elsewhere for my primary filter system.
The EFU-45v seems more apt for smaller tanks with such a low flow rate. 40 gal or less.
Pros
Ez setup
Ez substrate changes
Very low noise
Cons
Low flow rate
Electrical system not well protected from water

jbj Reaction 4 stage filter

by
JOSEPH LASPINA

Excellent!

Posted: 12/23/2011 from SUMMIT, NJ UNITED STATES

5.05

Experience Level:
Intermediate

Comments:Filter has been running for 5 days.I am waiting for the biologigical system to colinize before using the UV.So far the filter is running well,the water is crystal clear and all the fish are happy,I think. Great Filter to start with,easy to set up,lots of media room.

wonderful

Not good

by
JASON FRIEDMAN

Below Average

Posted: 5/25/2011 from Phoenix, AZ UNITED STATES

1.55

Experience Level:
Expert

Comments:Impossible to prime, had it for about a year. when I first installed it I broke a piece off the priming stick. Its a plastic stick like 4mm thick. a year later, tonight, I was replacing the media and it started leaking, then I broke another piece of the priming stick off and water shot throughout my kitchen. Dont buy

So Far So Good

by
BRENDA BELL

Great

Posted: 4/26/2011 from HUNTSVILLE, AL UNITED STATES

4.05

Experience Level:
Intermediate

Comments:Glad I read reviews prior to installing this. It helped a lot. Initially it leaked like a seive but I remembered reading that the lid has to be seated 'just so', or this would be an issue. Reseated lid, no more leaks. Have a 75 gallon tank but bought the filter rated for 100 and glad I did. Doesn't seem to move the same volume of water as my other filter but the tank was clearing up within hours of installation. Don't like the tubing contraption with the holes (neither did my Oscar) so I removed it. So far am pleased with the performance. Be sure and purchase extra media with the filter. Oh, and it is very quiet......

Issue on mechanical design

by
m shimo

Unsatisfactory

Posted: 2/14/2011 from CA UNITED STATES

1.05

Experience Level:
Intermediate

Comments:I have used this filter 1yr and half. There were many issue. Each parts does not have enough strength. Pump Rod is easy to break. Most critical point is weak sealing around Pump Rod. If water leaks from there, water will reach wirings of UV lamp area. Some of wires are not sealed for water proof, so current will leak to tank. Also, sealing gasket for UV lamp cover is weak against UV, too. Water will leak from there to inside of UV lamp.
It works, but I can't recommend this product.

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